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HP Configuration and Management of

HP headquarters East nowadays announced enhancements to its entry-priced very own laptop (pc) hardware and application configuration management solution.Designed to greatly in the reduction of the prices and complexity of managing PCs, the improved HP OpenView customer Configuration supervisor 2.0 gives medium-sized corporations or departments inside higher firms with a reliable, effortless-to-use and within your means workstation configuration administration solution. The original edition presents huge original manageability elements across multi-dealer, home windows-based client items and supports HP thin clients.additionally, HP introduced that for the first time every commercial HP laptops, computers, and workstations will start shipping with a pre-loaded HP OpenView Configuration management agent to aid further constrain down computer manageability expenses.more advantageous manageability with competitively priced ameliorate
pathHP OpenView customer Configuration supervisor presents IT directors a quick-to-install retort with highest out-of-the-box performance, including discovery and stock, working outfit deployment and migration, patch administration, software deployment, software usage metering, remote manage and HP hardware configuration administration.HP OpenView customer Configuration manager helps windows-based mostly pcs, notebooks, workstations and HP thin purchasers. original and better manageability aspects consist of:• HP hardware management – built-in management capabilities for HP hardware, together with BIOS (fundamental enter/output system) settings administration, computerized BIOS and driver updates, alert monitoring and vigour management• working device picture deployment – for remotely deploying and migrating operating methods• user surroundings migration – proposing automated capture and deployment of working equipment, applications and user settings between diverse PCs or operating techniques• utility utilization metering – enabling IT to accurately track software utilization throughout the commerce to optimise software licensing prices• Integration with HP ProtectTools -- for remotely initialising embedded depended on Platform Module chips and remotely deploying and managing the HP ProtectTools software application• extended scalability – providing twice the scalability of the outdated versionIn addition, a free add-on to HP OpenView customer Configuration supervisor provides waiton for Intel’s energetic administration expertise (AMT), enabling consumers to seize talents of potent original remote management and diagnostics capabilities constructed into PCs with Intel vPro expertise. since the brand original capabilities provided by course of Intel’s AMT expertise are based in hardware and firmware, HP OpenView can present technicians this performance however a pc is powered off, its OS is down, or its application agents are missing. These capabilities enable IT administrators to extend the effectivity of waiton desk services, shift greater workload off-hours when it received’t interfere with users productiveness, and carry ordinary superior service-level fine.HP OpenView customer Configuration manager also helps to dwindle the limitations of entry for shoppers to commence the adventure in opposition t becoming an adaptive enterprise by course of proposing an simple migration direction to different, more wholly featured and highly computerized and scalable solutions within the HP OpenView Configuration management portfolio. by proposing a robust foundation for future necessities, the retort makes it feasible for customers who locality
a premium on short time-to-value and ease-of-use to construct investments within the entry-priced providing today and value-readily upgrade as their needs develop and evolve.Pre-loaded agents hurries up time-to-valueHP also announced that an HP OpenView Configuration administration agent will now Come pre-loaded on every commerce HP laptops, desktops and workstations. The pre-loaded agent reduces the fees associated with managing PCs via removing the time spent via IT administrators to set up brokers on machines prior to managing them.The pre-loaded agent allows for customers to birthright
away seize potential of the free-of-cost HP OpenView client Configuration supervisor basic edition to instantly celebrate HP contraptions and operate hardware administration operations on HP client-based items. fundamental edition customers can seamlessly ameliorate
the software to HP OpenView customer Configuration supervisor premium version to seize learning of the full scope of hardware and utility administration performance provided by using the answer.extra information about the HP OpenView client Configuration supervisor and HP OpenView management application is accessible at www.hp.com/go/openview.About HPHP is a expertise options issuer to buyers, businesses and associations globally. The enterprise’s offerings span IT infrastructure, international features, commerce and residential computing, and imaging and printing. For the four fiscal quarters ended Oct. 31, 2006, HP revenue totaled $ninety one.7 billion. extra suggestions about HP (NYSE, Nasdaq: HPQ) is available at www.hp.com.About HP middle EastHP is the biggest technology and options company within the headquarters East with 670 personnel and subsidiaries in Dubai, Abu Dhabi, Riyadh, Jeddah, Khobar, Cairo, Ramallah and Oman servicing the GCC, Egypt and the Levant. HP has been current in the middle East considering 1968 and opened its first regional office in 1994. HP core East is the market chief for enterprise, wee
and medium enterprise and consumer know-how items and presents a huge portfolio of options and capabilities in various company domains.more information about HP in the core East is available at www.hp.com/me

The HP EliteBook x360 1040 G5 is a 2-in-1 company computer with striking aspects. For $2,349 (starting at $1,499), you gather robust Core i7 performance, a tactile keyboard, solid speakers and honorable battery lifestyles every packed interior a graceful, militia-demonstrated aluminum chassis. It does, although, possess a ton of bloatware and a frustratingly hazy display. but ordinary, the EliteBook x360 1040 is a fine enterprise 2-in-1.

article persevered under

HP EliteBook x360 cost and Configuration options

The EliteBook x360 1040 I tested costs $2,349 and is derived with an Intel Core i7-8650U vPro processor, 16GB of RAM, 512GB SSD, an Intel UHD 620 GPU and a 1080p screen.

the groundwork
model runs for $1,499 and drops you to a Core i5-8250U processor, 8GB of RAM and a 128GB SSD. meanwhile, the among the best model charges $5,679 and provides you with a Core i7-8550U, 32GB of RAM, 2TB SSD, LTE connectivity and a 4K monitor.

Design

The x360 1040 has an aluminum build with a satin conclude layered over its swish silver design. like different EliteBooks, it's accompanied via HP's curb emblem and a two-toned upper lip. On the again, there are two three-edged hinges that are carved outward and between them is a neatly placed EliteBook emblem.

The indoors has HP's neatly-spaced keyboard with speaker vents on either side and a fingerprint reader simply underneath it. The side bezels are particularly slim, but the preempt one has some meat on it as a result of the IR webcam. when I folded this baby into tablet mode, the again of the lid in reality magnetized to the underside, giving it a greater transparent
and stable convertible design, in comparison with non-magnetic alternatives.

The left facet facets one USB 3.1 port, a headphone jack, the power button and a protection lock slot, whereas the preempt holds one USB 3.1 port, an HDMI 1.4 port, two Thunderbolt 3 ports and the volume rocker.

security and durability

don't let the petite build idiot you. The x360 1040 passed 12 MIL-STD-810G exams, so it may well live on drops, vibrations, shock and temperature shock, high and low temperatures, dust, immoderate altitudes, humidity, sand, an explosive environment and an entire freezing and thawing procedure.

with reference to protection, you gather Intel vPro for far flung management, an IR camera to entry windows hi there and a fingerprint reader. The computing device additionally comes with HP sure birth, which is a self-curative BIOS, and HP bound Run, which protects the protection procedures from malware. which you could gather a configuration with HP's bound View, which is a privateness monitor that narrows viewing angles.

screen

while the EliteBook x360's 14-inch, 1920 x 1080 panel produces superb colour and brightness, the expose has a grainy-movie consequence caused by course of the anti-glare solution, which is regarding in a $2,000-plus desktop. other producers additionally construct matte panels, however this one has me invariably combating the urge to wipe what looks like a fingerprint-smudged monitor.

When Rafiki snapped the crimson root in the recent trailer for The Lion King, it created a cloud of crimson grime that turned into superb on the EliteBook x360's reveal. The hairs on Simba's adorable head were a bit fuzzy because of the filmy layer on the monitor. When an older Simba roars at the discontinue of the trailer, the encompassing rocks possess been seen despite the shortcoming of easy.

whereas the EliteBook x360's 14-inch, 1920 x 1080 panel produces exceptional color and brightness, the expose has a grainy-movie repercussion
led to by course of the anti-glare solution.

The EliteBook x360's panel averaged 340 nits of brightness, beating the 328-nit category standard, as neatly because the Latitude 7490 (277 nits) and the ThinkPad X1 Carbon (293 nits). but it surely failed to Come close to the MateBook X seasoned's 458 nits.

Keyboard, Touchpad and Pen

HP's elegantly carved keyboard provides an immensely pleasurable typing experience, as each and every key delivered solid tactile feedback. I most effective hope that the white backlighting possess been a limited enhanced.

The EliteBook's keys possess simplest 1.4 millimeters of trip (we prefer 1.5 to 2.0mm), however the keyboard's 70 grams of actuation constrain greater than construct up for it. I sped via seventy three phrases per minute on the 10fastfingers.com typing eye at various, beating my typical sixty six wpm.

The EliteBook x360's HP energetic Pen G2 has three programmable buttons and 4,096 ranges of drive sensitivity. It felt decent to hang, and it moved fluidly as I used it to design a mock-dungeon for my Dungeons & Dragons campaign. The pen is additionally magnetic, so it will possibly connect to the left side of the chassis for secure-conserving, and it can live recharged by course of a USB category-C port.

The four.3 x 2.5-inch is simple to the contact and presents a weighty click on, which makes navigation suppose so herbal. home windows 10 gestures like two-finger scrolling and three-finger tabbing were positive.

Audio

These Bang & Olufsen top-firing speakers reproduced Blue October's "Into the Ocean" with zeal, because the sound blasted throughout their wee
lab. the hole vocals and tender guitar strums intertwined with solid volume of treble and bass. birthright
through the 2d verse, the drums lulled me into a trance with their rhythmic beat as they supported the vocals, but it became a bit complicated to construct out the bass guitar.

greater: I Spent greater than $200 on Headphones: you'll want to Too

The Bang & Olufsen Audio application presents a full equalizer along with presets for Voice, films and music.

efficiency

The EliteBook x360's Core i7-8650U processor with 16GB of RAM did not skip a beat as I blasted through 40 Google Chrome tabs and three 1080p YouTube videos, every whereas I performed candy mash Saga.

The EliteBook x360 sped through their outstrip
examine (matching sixty five,000 names and addresses) in 1 minute and 22 seconds, which is a bit quicker than the 1:31 class commonplace. The Latitude 7490 (1:19) and ThinkPad X1 Carbon (1:eleven) did it sooner, however the MateBook X pro (1:forty nine) became left in the back of.

Transcoding a 4K video to 1080p took 19 minutes and 1 2d for EliteBook x360 1040, marking its victory over the premium computing device routine (21:forty three), the Latitude 7490 (21:35) and the MateBook X professional (27:18). meanwhile, the ThinkPad X1 Carbon came out forward of the EliteBook by one 2nd.

The EliteBook x360's Core i7-8650U processor with 16GB of RAM failed to pass a beat as I blasted via 40 Google Chrome tabs and three 1080p YouTube video clips.

In precise-world checking out, the EliteBook x360 averaged sixty two frames per 2d on the filth 3 racing video game benchmark, which doesn't hardy the 76-fps category average. The Latitude 7490 (sixty four fps) and ThinkPad X1 Carbon (sixty three fps) didn't achieve a all lot improved. The MateBook X seasoned, although, excelled with 117 fps.

Battery life

The EliteBook x360 will gather you through your workday and then some. After at every times browsing the net over Wi-Fi at one hundred fifty nits of brightness, the battery lasted eight hours and fifty nine minutes, which surpasses the eight:31 top rate desktop regular and the Latitude 7490 (eight:55). youngsters, the MateBook X pro (9:fifty five) and ThinkPad X1 Carbon (11:01) blew HP's desktop out of the water.

Webcam

The verify pictures I took on the EliteBook x360's 1080p webcam did not Come out too grainy, as I could spot some detail in my beard.

however once I zoomed in, every thing become tender and muddy. It picked up the skinny turquoise lines on my flannel shirt, but the webcam blew out the ceiling lights and made the relaxation of the play darker than it'll had been. ordinary, it live not unhealthy, nonetheless it's no longer first rate, either.

heat

This baby is a stone-cold killer. They streamed a 15-minute HD video and the underside hit simplest ninety one levels, which is under their ninety five-diploma console threshold. The middle of the keyboard and touchpad measured 87 and 86 levels, respectively. The preferred it got turned into ninety four degrees on the lower-left underside.

There is a few home windows 10 bloatware, together with Township, Cooking Fever and candy mash Saga.

Our configuration comes with a 3-yr constrained warranty (downgradable to 12 months). perceive how HP performed on their Tech back Showdown and premiere and Worst manufacturers rating.

base line

here is one badass desktop. HP's EliteBook x360 1040 G5 backs up its potent specs and all-around design with a restful
keyboard and sturdy audio paired with a long-lasting battery and astounding security points. What gives me pause is its inordinately hazy display.

in case you want to rescue some cash, that you may gather the MateBook X seasoned for $1,499, which has a brighter reveal, longer battery life, more advantageous photographs and a slimmer profile. although, if you are after something greater versatile, the EliteBook x360 is a pretty honorable customary 2-in-1 company laptop.

Bulletproof solutions is a full-provider IT issuer primarily based in Atlantic Canada that advises and gives shoppers with recommended IT infrastructure administration to optimize their companies' efficiency and protection. The commerce formerly used HP OpenView to pomp
screen clients' networks, but Joshua Biggley, Operations Architect for Bulletproof options, stated his group turned into disappointed by using the high complete cost of possession and extensive time commitments required to construct exercise
of the utility.

"HP OpenView did not drudgery for us because the gadget required too a lot application to extend and keep. They very nearly needed an HP consultant to construct exercise
of it," Biggley talked about.

Bulletproof solutions sought to supplant HP OpenView with a solution that become convenient to install, would supply out-of-the-container cost, and would drudgery seamlessly with other fundamental management tools. The group establish what they mandatory in SolarWinds network efficiency monitor (NPM) and SolarWinds community Configuration manager (NCM).

"SolarWinds has a dwindle complete can saturate of possession and a an poor
lot shorter return on funding than HP OpenView," Biggley spoke of.

Biggley and his team often exercise
SolarWinds NPM and SolarWinds NCM to determine and address concerns in their valued clientele' network bandwidth, to video pomp
hardware efficiency, and to again up hardware configurations. Biggley has additionally needed to troubleshoot complications for shoppers and has generally reached out to SolarWinds' customer aid, product managers, and SolarWinds' person community, thwack, to find answers to his questions.

"SolarWinds looks like a magical mixture of low in cost utility and exemplary consumer provider," Biggley referred to. "or not it's one of the most most fulfilling relationships they possess now ever had with a network monitoring application supplier."

For more information on Bulletproof solutions' success with SolarWinds, read the entire case examine.

SolarWinds network efficiency pomp
screen gives potent and easy-to-use community fault and availability management for networks of every sizes. It detects, diagnoses and resolves community concerns; tracks response time, availability and uptime of routers, switches and different SNMP-enabled contraptions; and suggests efficiency facts in accurate time with out-of-the-container studies.

About SolarWinds SolarWinds ( NYSE : SWI ) provides potent and budget friendly IT administration application to purchasers global from Fortune 500 organisations to wee
corporations. In every of their market areas, their approach is consistent. They focal point exclusively on IT professionals and try to dispose of the complexity that they've been pressured to accept from routine enterprise utility carriers. SolarWinds supplies on this dedication with surprising simplicity via products that are simple to find, purchase, exercise
and retain whereas offering the power to tackle any IT management problem on any scale. Their solutions are rooted in their abysmal connection to their person base, which interacts in their online group, thwack, to remedy problems, partake
know-how and surest practices, and directly seize partake
in their product pile
system. learn more today at http://www.solarwinds.com/.

SolarWinds, SolarWinds.com and thwack are registered emblems of SolarWinds. every other enterprise and product names outlined are used most effective for identification purposes and might live emblems or registered logos of their respective companies.

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Configuration and Management of HP integrity Mid-range Servers

When mission-critical applications fail, so does your business. This often is a accurate statement in today's environments, where most organizations disburse millions of dollars making their services available 24/7, 365 days a year. Organizations, regardless of whether they are serving external customers or internal customers, are deploying highly available solutions to construct their applications highly available.

In view of this growing demand, almost every IT vendor currently is providing high-availability solutions for its specific platform. eminent commercial high-availability solutions include IBM's HACMP, Veritas' Cluster Server and HP's Serviceguard.

If you're looking for a commercial high-availability solution on Red Hat Enterprise Linux, the best option probably is the Red Hat Cluster Suite.

In early 2002, Red Hat introduced the first member of its Red Hat Enterprise Linux family of products, Red Hat Enterprise Linux AS (originally called Red Hat Linux Advanced Server). Since then, the family of products has grown steadily, and it now includes Red Hat Enterprise Linux ES (for entry- and mid-range servers) and Red Hat Enterprise Linux WS (for desktops/workstations). These products are designed specifically for exercise
in enterprise environments to deliver superior application support, performance, availability and scalability.

The original release of Red Hat Enterprise Linux AS version 2.1 included a high-availability clustering feature as partake
of the groundwork
product. This feature was not included in the smaller Red Hat Enterprise Linux ES product. However, with the success of the Red Hat Enterprise Linux family, it became transparent
that high-availability clustering was a feature that should live made available for both AS and ES server products. Consequently, with the release of Red Hat Enterprise Linux version 3 in October 2003, the high-availability clustering feature was packaged into an optional layered product called the Red Hat Cluster Suite, and it was certified for exercise
on both the Enterprise Linux AS and Enterprise Linux ES products.

The RHEL cluster suite is a separately licensed product and can live purchased from Red Hat on top of Red Hat's groundwork
ES Linux license.

Red Hat Cluster Suite Overview

The Red Hat Cluster Suite has two major features. One is the Cluster Manager that provides high availability, and the other feature is called IP load balancing (originally called Piranha). The Cluster Manager and IP load balancing are complementary high-availability technologies that can live used separately or in combination, depending on application requirements. Both of these technologies are integrated in Red Hat's Cluster Suite. In this article, I focus on the Cluster Manager.

Lock management is a common cluster infrastructure service that provides a mechanism for other cluster infrastructure components to synchronize their access to shared resources. In a Red Hat cluster, DLM (Distributed Lock Manager) or, alternatively, GULM (Grand Unified Lock Manager) are feasible lock manager choices. GULM is a server-based unified cluster/lock manager for GFS, GNBD and CLVM. It can live used in space of CMAN and DLM. A single GULM server can live hasten in standalone mode but introduces a single point of failure for GFS. Three or five GULM servers also can live hasten together, in which case the failure of one or two servers can live tolerated, respectively. GULM servers usually are hasten on dedicated machines, although this is not a strict requirement.

In my cluster implementation, I used DLM, and it runs in each cluster node. DLM is honorable option for wee
clusters (up to two nodes), because it removes quorum requirements as imposed by the GULM mechanism).

Based on DLM or GLM locking functionality, there are two basic techniques that can live used by the RHEL cluster for ensuring data integrity in concurrent access environments. The traditional course is the exercise
of CLVM, which works well in most RHEL cluster implementations with LVM-based analytic volumes.

Another technique is GFS. GFS is a cluster filesystem that allows a cluster of nodes to access simultaneously a block device that is shared among the nodes. It employs distributed metadata and multiple journals for optimal operation in a cluster. To maintain filesystem integrity, GFS uses a lock manager (DLM or GULM) to coordinate I/O. When one node changes data on a GFS filesystem, that change is visible immediately to the other cluster nodes using that filesystem.

Hence, when you are implementing a RHEL cluster with concurrent data access requirements (such as, in the case of an Oracle RAC implementation), you can exercise
either GFS or CLVM. In most Red Hat cluster implementations, GFS is used with a direct access configuration to shared SAN from every cluster nodes. However, for the selfsame purpose, you also can deploy GFS in a cluster that is connected to a LAN with servers that exercise
GNBD (Global Network block Device) or two iSCSI (Internet wee
Computer System Interface) devices.

Both GFS and CLVM exercise
locks from the lock manager. However, GFS uses locks from the lock manager to synchronize access to filesystem metadata (on shared storage), while CLVM uses locks from the lock manager to synchronize updates to LVM volumes and volume groups (also on shared storage).

For nonconcurrent RHEL cluster implementations, you can dependence
on CLVM, or you can exercise
indigenous RHEL journaling-based techniques (such as ext2 and ext3). For nonconcurrent access clusters, data integrity issues are minimal; I tried to maintain my cluster implementations simple by using indigenous RHEL OS techniques.

Fencing Infrastructure

Fencing also is an primary component of every RHEL-based cluster implementation. The main purpose of the fencing implementation is to ensure data integrity in a clustered environment.

In fact, to ensure data integrity, only one node can hasten a cluster service and access cluster service data at a time. The exercise
of power switches in the cluster hardware configuration enables a node to power-cycle another node before restarting that node's cluster services during the failover process. This prevents any two systems from simultaneously accessing the selfsame data and corrupting it. It is strongly recommended that fence devices (hardware or software solutions that remotely power, shut down and reboot cluster nodes) are used to guarantee data integrity under every failure conditions. Software-based watchdog timers are an alternative used to ensure reform operation of cluster service failover; however, in most RHEL cluster implementations, hardware fence devices are used, such as HP ILO, APC power switches, IBM BladeCenter devices and the Bull NovaScale Platform Administration Processor (PAP) Interface.

Note that for RHEL cluster solutions with shared storage, an implementation of the fence infrastructure is a mandatory requirement.

Step-by-Step Implementation of a RHEL Cluster

Implementation of RHEL clusters starts with the selection of proper hardware and connectivity. In most implementations (without IP load balancing), shared storage is used with two, or more than two, servers running the RHEL operating system and RHEL cluster suite.

A properly designed cluster, whether you are pile
a RHEL-based cluster or an IBM HACMP-based cluster, should not accommodate
any single point of failure. Keeping this in mind, you possess to remove any single point of failure from your cluster design. For this purpose, you can space your servers physically in two sunder racks with redundant power supplies. You also possess to remove any single point of failure from the network infrastructure used for the cluster. Ideally, you should possess at least two network adapters on each cluster node, and two network switches should live used for pile
the network infrastructure for the cluster implementation.

Software Installation

Building a RHEL cluster starts with the installation of RHEL on two cluster nodes. My setup has two HP Proliant servers (DL740) with shared fiber storage (HP MSA1000 storage). I started with a RHEL v4 installation on both nodes. It's best to install the latest available operating system version and its updates. I selected v4 update 4 (which was the latest version of RHEL when I was pile
that cluster). If you possess a valid software subscription from Red Hat, you can log in to the Red Hat network, and fade to software channels to download the latest update available. Later, once you download the ISO images, you can parch
it to CDs using any preempt software. During the RHEL OS installation, you will fade through various configuration selections, the most primary of which are the date and time-zone configuration, the root user password setting, firewall settings and OS security plane selection. Another primary configuration option is network settings. Configuration of these settings can live left for a later stage, especially in pile
a high-availability solution with Ether-channel (or Ethernet bonding configuration).

You may need to install additional drivers after you install the OS. In my case, I downloaded the RHEL back package for the DL740 servers (the HP Proliant back pack, which is available from h18004.www1.hp.com/products/servers/linux/dl740-drivers-cert.html).

The next step is installing the cluster software package itself. This package, again, is available from the RHEL network, and you definitely possess to select the latest available cluster package. I selected rhel-cluster-2.4.0.1 for my setup, which was the latest cluster suite available at the time.

Once downloaded, the package will live in tar format. Extract it, and then install at least the following RPMs, so that the RHEL cluster with DLM can live installed and configured:

Magma and magma-plugins

Perl-net-telnet

Rgmanager

System-config-cluster

DLM and dlm-kernel

DLM-kernel-hugemem and SMP back for DLM

Iddev and ipvsadm

Cman, cman-smp, cman-hugemem and cman-kernelheaders

Ccs

Restart both RHEL cluster nodes after installing vendor-related hardware back drivers and the RHEL cluster suite.

Network Configuration

For network configuration, the best course to proceed is to exercise
the network configuration GUI. However, if you course to exercise
Ethernet channel bonding, the configuration steps are slightly different.

Ethernet channel bonding allows for a fault-tolerant network connection by combining two Ethernet devices into one virtual device. The resulting channel-bonded interface ensures that if one Ethernet device fails, the other device will become active. Ideally, connections from these Ethernet devices should fade to sunder Ethernet switches or hubs, so that the single point of failure is eliminated, even on the Ethernet switch and hub level.

To configure two network devices for channel bonding, effect the following on node 1:

1) Create bonding devices in /etc/modules.conf. For example, I used the following commands on each cluster node:

alias bond0 bonding
options bonding miimon=100 mode=1

Doing this loads the bonding device with the bond0 interface name and passes options to the bonding driver to configure it as an active-backup master device for the enslaved network interfaces.

2) Edit the /etc/sysconfig/network-scripts/ifcfg-eth0 configuration file for eth0 and the /etc/sysconfig/network-scripts/ifcfg-eth1 file for the eth1 interface, so that these files prove identical contents, as shown below:

5) Similarly, on node 2, reiterate the selfsame steps with the only incompatibility
being that the file /etc/sysconfig/network-scripts/ifcfg-bond0 should accommodate
an IPADDR entry with the value of 172.16.2.183.

As a result of these configuration steps, you will discontinue up with two RHEL cluster nodes with IP addresses of 172.16.2.182 and 172.16.2.183, which possess been assigned to virtual Ethernet channels (the underlying two physical Ethernet adapters for each Ethernet channel).

Now, you easily can exercise
the network configuration GUI on the cluster nodes to set other network configuration details, such as hostname and primary/secondary DNS server configuration. I set Commsvr1 and Commsvr2 as the hostnames for the cluster nodes and also ensured that name resolution in both long names and short names would drudgery fine from both the DNS server and the /etc/hosts file.

A RHEL cluster, by default, uses /etc/hosts for node name resolution. The cluster node name needs to match the output of uname -n or the value of HOSTNAME in /etc/sysconfig/network.

If you possess an additional Ethernet interface in each cluster node, it is always a honorable conception to configure a sunder IP network as an additional network for heartbeats between cluster nodes. It is primary that the RHEL cluster uses, by default, eth0 on the cluster nodes for heartbeats. However, it is still feasible to exercise
other interfaces for additional heartbeat exchanges.

For this ilk
of configuration, you simply can exercise
the network configuration GUI to allot IP addresses—for example, 192.168.10.1 and 192.168.10.2 on eth2, and gather it resolved from the /etc/hosts file.

Setup of the Fencing Device

As I was using HP hardware, I relied on the configuration of the HP ILO devices as a fencing device for my cluster. However, you may respect
configuring other fencing devices, depending on the hardware ilk
used for your cluster configuration.

To configure HP ILO, you possess to reboot your servers and press the F8 key to enter into the ILO configuration menus. Basic configuration is relatively simple; you possess to allot IP addresses to ILO devices with the name of the ILO device. I assigned 172.16.1.100 with Commilo1 as the name of ILO device on node1, and 172.16.1.101 with Commilo2 as the ILO device name on node2. live sure, however, to connect Ethernet cables to the ILO adapters, which usually are marked clearly on the back side of HP servers.

Once rebooted, you can exercise
the browsers on your Linux servers to access ILO devices. The default user name is Administrator, with a password that usually is available on the hard-copy tag associated with the HP servers. Later, you can change the Administrator password to a password of your choice, using the selfsame Web-based ILO administration interface.

Setup of the Shared Storage Drive and Quorum Partitions

In my cluster setup environment, I used an HP fiber-based shared storage MSA1000. I configured a RAID-1 of 73.5GB using the HP smart array utility, and then assigned it to both of my cluster nodes using the selective host presentation feature.

After rebooting both nodes, I used HP fiber utilities, such as hp_scan, so that both servers should live able to perceive this array physically.

To verify the physical availability of shared storage for both cluster nodes, eye in the /dev/proc/proc file for an entry like /dev/sda or /dev/sdb, depending upon your environment.

Once you find your shared storage on the OS level, partition it according to your cluster storage requirements. I used the parted appliance
on one of my cluster nodes to partition the shared storage. I created two wee
primary partitions to hold raw devices, and a third primary partition was created to hold the shared data filesystem:

I rebooted both cluster nodes and created the /etc/sysconfig/rawdevices file with the following contents:

/dev/raw/raw1 /dev/sda1
/dev/raw/raw2 /dev/sda2

A restart of rawdevices services on both nodes will configure raw devices as quorum partitions:

/home/root> services rawdevices restart

I then created a JFS2 filesystem on the third primary partition using the mke2jfs command; however, its related entry should not live allot in the /etc/fstab file on either cluster node, as this shared filesystem will live under the control of the Rgmanager of the cluster suite:

/home/root> mke2jfs -j -b 4096 /dev/sda3

Now, you can create a directory structure called /shared/data on both nodes and verify the accessibility of the shared filesystem from both cluster nodes by mounting that filesystem one by one at each cluster node (mount /dev/sda3 /shared/data). However, never try to mount this filesystem on both cluster nodes simultaneously, as it might vitiate
the filesystem itself.

Cluster Configuration

Almost everything required for cluster infrastructure has been done, so the next step is configuring the cluster itself.

A RHEL cluster can live configured in many ways. However, the easiest course to configure a RHEL cluster is to exercise
the RHEL GUI and fade to System Management→Cluster Management→Create a cluster.

I created a cluster with the cluster name of Commcluster, and with node names of Commsvr1 and Commsvr2. I added fencing to both nodes—fencing devices Commilo1 and Commilo2, respectively—so that each node would possess one fence plane with one fence device. If you possess multiple fence devices in your environment, you can add another fence plane with more fence devices to each node.

I also added a shared IP address of 172.16.2.188, which will live used as the service IP address for this cluster. This is the IP address that also should live used as the service IP address for applications or databases (like for listener configuration, if you are going to exercise
an Oracle database in the cluster).

I added a failover domain, namely Kmeficfailover, with priorities given in the following sequence:

Commsvr1
Commsvr2

I added a service called CommSvc and then allot that service in the above-defined failover domain. The next step is adding resources to this service. I added a private resource of the filesystem type, which has the characteristic of device=/dev/sd3, mountpoint of /shared/data and mount ilk
of ext3.

I also added a private resource of the script ilk
(/root/CommS.sh) to service CommSvc. This script will start my C-based application, and therefore, it has to live present in the /root directory on both cluster nodes. It is very primary to possess reform ownership of root and security; otherwise, you can await
unpredictable conduct during cluster startup and shutdown.

Application or database startup and shutdown scripts are very primary for a RHEL-based cluster to office properly. RHEL clusters exercise
the selfsame scripts for providing application/database monitoring and high availability, so every application script used in a RHEL cluster should possess a specific format.

All such scripts should at least possess start and discontinue subsections, along with a status subsection. When an application or database is available and running, the status subsection of the script should return a value of 0, and when an application is not running or available, it should return a value of 1. The script also should accommodate
a restart subsection, which tries to restart services if the application is establish to live dead.

A RHEL cluster always tries to restart the application on the selfsame node that was the previous owner of the application, before trying to run that application to the other cluster node. A sample application script, which was used in my RHEL cluster implementation (to provide high availability to a legacy C-based application) is shown in Listing 2.

Finally, you possess to add a shared IP address (172.16.2.188) to the service present in your failover domain, so that the service should accommodate
three resources: two private resources (one filesystem and one script) and one shared resource, which is the service IP address for the cluster.

The eventual step is synchronizing the cluster configuration across the cluster nodes. The RHEL cluster administration and configuration appliance
provides a “save configuration to cluster” option, which will appear once you start the cluster services. Hence, for the first synchronization, it is better to send the cluster configuration file manually to every cluster nodes. You easily can exercise
the scp command to synchronize the /etc/cluster/cluster.conf file across the cluster nodes:

Once synchronized, you can start cluster services on both cluster nodes. You should start and discontinue RHEL-related cluster services, in sequence.

To start:

service ccsd start
service cman start
service fenced start
service rgmanager start

To stop:

service rgmanager stop
service fenced stop
service cman stop
service ccsd stop

If you exercise
GFS, startup/shutdown of the gfs and clvmd services possess to live included in this sequence.

Additional Considerations

In my environment, I decided not to start cluster services at RHEL boot time and not to shut down these services automatically when shutting down the RHEL box. However, if your commerce requires 24/7 service availability, you can achieve this easily by using the chkconfig command.

Another consideration is logging cluster messages in a different log file. By default, every cluster messages fade into the RHEL log messages file (/var/log/messages), which makes cluster troubleshooting partially difficult in some scenarios. For this purpose, I edited the /etc/syslog.conf file to enable the cluster to log events to a file that is different from the default log file and added the following line:

daemon.* /var/log/cluster

To apply this change, I restarted syslogd with the service syslog restart command. Another primary step is to specify the time period for rotating cluster log files. This can live done by specifying the name of the cluster log file in the /etc/logrotate.conf file (the default is a weekly rotation):

You also possess to pay special attention to keeping UIDs and GIDs synchronized across cluster nodes. This is primary in making sure proper permissions are maintained, especially with reference to the shared data filesystem.

GRUB also needs to conform to the suite environment's specific needs. For instance, many system administrators, in a RHEL cluster environment, reduce the GRUB selection timeout to some lower values, such as two seconds, to accelerate system restart time.

Database Integration with a RHEL Cluster

The selfsame RHEL cluster infrastructure can live used for providing high availability to databases, such as Oracle, MySQL and IBM DB2.

The most primary thing to bethink is to groundwork
your database-related services on a shared IP address—for example, you possess to configure Oracle listener based on the shared service IP address.

Next, I explain, in simple steps, how to exercise
an already-configured RHEL cluster to provide high availability to a MySQL database server, which is, no doubt, one of the most commonly used databases on RHEL.

I assume that the MySQL-related RPMs are installed on both cluster nodes and that the RHEL cluster already is configured with a service IP address of 172.16.2.188.

Now, you simply need to define a failover domain using the cluster configuration appliance
(with the cluster node of your option having a higher priority). This failover domain will possess the MySQL service, which, in turn, will possess two private resources and one shared resource (the service IP address).

One of the private resources should live of the filesystem ilk
(in my configuration, it has a mountpoint of /shared/mysqld), and the other private resource should live of the script type, pointing toward the /etc/init.d/mysql.server script. The contents of this script, which should live available on both cluster nodes, is shown in Listing 3 on the LJ FTP site at ftp.linuxjournal.com/pub/lj/listings/issue163/9759.tgz.

This script sets the data directory to /shared/mysqld/data, which is available on their shared RAID array and should live available from both cluster nodes.

Testing for high availability of the MySQL database can live done easily with the waiton of any MySQL client. I used SQLyog, which is a Windows-based MySQL client. I connected to the MySQL database on Commsvr1 and then crashed this cluster node using the halt command. As a result of this system crash, the RHEL cluster events were triggered, and the MySQL database automatically restarted on Commsvr2. This all failover process took one to two minutes and happened quite seamlessly.

Summary

RHEL clustering technology provides a dependable high-available infrastructure that can live used for meeting 24/7 commerce requirements for databases as well as legacy applications. The most primary thing to bethink is that it is best to course carefully before the actual implementation and test your cluster and every feasible failover scenarios thoroughly before going live with a RHEL cluster. A well-documented cluster test course also can live helpful in this regard.

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